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			<span id="titleName">计算机网络</span>			
			<a class="exams-time">姓名&nbsp;:&nbsp;高佳琪</a>
			<a class="exam-userid"><i class="fa fa-sign-in" aria-hidden="true"></i> 学号&nbsp;:&nbsp;192373412300004</a>		
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				<div id="shijuandiv"><p class="p-title">一、简答( 每题参考分值5分 )</p>                    <!-- 11 句子翻译 13 写作 9 填空-->             <div id="Q_1" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:125%">1、<span style="line-height:125%;  font-family:Microsoft Yahei">五层协议的体系结构分别是物理层、数据链路层、网络层、传输层和应用层，各层的作用和功能是什么？</span><span style="line-height:125%">&nbsp; </span><span lang="EN-US" style="line-height:  125%">&nbsp;</span></p></div>        <textarea id="76450" name="76450" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal" style="text-autospace:none"><span style="font-size:11.0pt;  font-family:Microsoft Yahei">（1）应用层：确定应用进程之间通信的性质以满足用户或某类问题的需要。&nbsp; （2）运输层：任务是负责主机中两个应用进程间的逻辑通信，即为应用进程之间提供端到端的逻辑通信。因特网的运输层可使用TCP 和UDP协议。&nbsp; （3）网络层：网络层负责为分组选择合适的路由，使源主机运输层所传下来的分组能够交付到目的主机。&nbsp; （4）数据链路层：数据链路层的任务是将网络层交下来的数据报组装成帧（frame)，在两个相邻结点间的链路上实现帧的无比特差错传输。&nbsp; （5）物理层：任务就是透明地传输比特流。考虑用多大的电压代表“1”或“0”，以及当发送端发出比特“1”时，接收端如何识别出这是“1”而不是“0”。物理层还要确定连接电缆的插头应当有多少根脚以及各个脚如何连接。</span></p></div></div>             <div id="Q_2" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:125%">2、<span style="line-height:125%;  font-family:Microsoft Yahei">什么是网络体系结构？为什么要定义网络体系结构？</span></p></div>        <textarea id="76449" name="76449" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal"><span style="font-size:11.0pt;font-family:Microsoft Yahei">网络的体系结构定义：指计算机网络的各层及其协议的集合(architecture)，或精确定义为这个计算机网络及其部件所应完成的功能。计算机网络的体系结构综合了OSI和TCP/IP的优点，本身由5层组成：应用层、运输层、网络层、物理层和数据链路层。</span></p></div></div>             <div id="Q_3" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:125%">3、<span style="font-family:Microsoft Yahei">试简述分组交换的要点。</span></p></div>        <textarea id="76444" name="76444" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal"><span style="font-size:12.0pt;font-family:Microsoft Yahei">答：在分组交换网络中，采用存储转发方式工作，数据以短的分组形式传送。如果一个源站有一个长的报文要发送，该报文就会被分割成一系列的分组。每个分组包含用户数据的一部分加上一些控制信息。控制信息至少要包括网络为了把分组送到目的地做路由选择所需要的信息。在路径上的每个结点，分组被接收，短时间存储，然后传递给下一结点。</span></p> <p class="MsoNormal"><span style="font-size:12.0pt;font-family:Microsoft Yahei">分组交换网的主要优点：①</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family:  Microsoft Yahei">高效。②</span><span style="font-size:12.0pt"> </span><span style="font-size:  12.0pt;font-family:Microsoft Yahei">灵活。③</span><span style="font-size:12.0pt"> </span><span style="font-size:12.0pt;font-family:Microsoft Yahei">迅速。④</span><span style="font-size:  12.0pt"> </span><span style="font-size:12.0pt;font-family:Microsoft Yahei">可靠。</span></p> <p class="MsoNormal"><span style="font-size:12.0pt;font-family:Microsoft Yahei">缺点：分组在节点转发时因排队而造成一定的延时</span><span lang="EN-US" style="font-size:12.0pt">;</span><span style="font-size:12.0pt;  font-family:Microsoft Yahei">分组必须携带一些控制信息而产生额外开销</span><span lang="EN-US" style="font-size:  12.0pt">;</span></p></div></div>             <div id="Q_4" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:150%">4、<span style="font-size:12.0pt;  line-height:150%;font-family:Microsoft Yahei">为什么要采用信道复用技术？常见的信道复用技术有哪些？</span></p></div>        <textarea id="76456" name="76456" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal" style="line-height:150%"><span style="font-size:12.0pt;  line-height:150%;font-family:Microsoft Yahei">（</span><span lang="EN-US" style="font-size:  12.0pt;line-height:150%">1</span><span style="font-size:12.0pt;line-height:  150%;font-family:Microsoft Yahei">）在数据通信中，复用技术的使用极大地提高了信道的传输效率，取得了广泛地应用。多路复用技术就是在发送端将多路信号进行组合（如广电前端使用的混合器），然后在一条专用的物理信道上实现传输，接收端再将复合信号分离出来。</span></p> <p class="MsoNormal" style="line-height:150%"><span style="font-size:12.0pt;  line-height:150%;font-family:Microsoft Yahei">（</span><span lang="EN-US" style="font-size:  12.0pt;line-height:150%">2</span><span style="font-size:12.0pt;line-height:  150%;font-family:Microsoft Yahei">）多路复用技术主要分为两大类：频分多路复用（简称频分复用）和时分多路复用（简称时分复用），波分复用和统计复用本质上也属于这两种复用技术。另外还有一些其他的复用技术，如码分复用、极化波复用和空分复用等。</span></p></div></div>             <div id="Q_5" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:150%">5、<span style="font-size:12.0pt;  line-height:150%;font-family:Microsoft Yahei">试简述</span><span lang="EN-US" style="font-size:  12.0pt;line-height:150%">IPv6</span><span style="font-size:12.0pt;line-height:  150%;font-family:Microsoft Yahei">和</span><span lang="EN-US" style="font-size:12.0pt;  line-height:150%">IPv4</span><span style="font-size:12.0pt;line-height:150%;  font-family:Microsoft Yahei">的区别。</span></p></div>        <textarea id="76455" name="76455" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">1</span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">、</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">IPv6 </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">仍支持无连接的传送，所引进的主要变化如下：</span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">A </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">更大的地址空间。</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">IPv6 </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">将地址从</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">IPv4 </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">的</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">32 </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">位增大到了</span><span lang="EN-US" style="font-size:12.0pt;line-height:150%">128 </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">位。</span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">B </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">扩展的地址层次结构。</span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">C </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">灵活的首部格式。</span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">D </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">改进的选项。</span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">E </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">允许协议继续扩充。</span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">F </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">支持即插即用（即自动配置）</span></p> <p class="MsoNormal" style="line-height:150%"><span lang="EN-US" style="font-size:12.0pt;line-height:150%">G </span><span style="font-size:  12.0pt;line-height:150%;font-family:Microsoft Yahei">支持资源的预分配。</span></p></div></div>             <div id="Q_6" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:125%">6、<span style="font-family:Microsoft Yahei">试指出</span><span lang="EN-US">OSI</span><span style="font-family:Microsoft Yahei">所包括的三级抽象及各自的具体内容。</span></p></div>        <textarea id="76463" name="76463" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">OSI</span><span style="font-size:12.0pt;font-family:Microsoft Yahei">包括的三级抽象为：体系结构：定义了一个七层模型，用以进行进程间的通信，并作为一个框架来协调各层标准的制定</span><span lang="EN-US" style="font-size:12.0pt">;</span><span style="font-size:12.0pt;  font-family:Microsoft Yahei">服务定义描述了各层所提供的服务，以及层与层之间的抽象接口和交互用的原语</span><span lang="EN-US" style="font-size:12.0pt">;</span><span style="font-size:12.0pt;font-family:  Microsoft Yahei">协议规范精确定义了应当发送何种控制信息及用何种过程来解释该控制信息。</span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">&nbsp;</span></p></div></div>             <div id="Q_7" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:125%">7、<span lang="EN-US">ARP</span><span style="font-family:Microsoft Yahei">协议的工作原理</span></p></div>        <textarea id="76453" name="76453" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal" style="line-height:125%"><span style="font-family:Microsoft Yahei">在</span><span lang="EN-US">TCP/IP</span><span style="font-family:Microsoft Yahei">协议中，</span><span lang="EN-US">A</span><span style="font-family:Microsoft Yahei">给</span><span lang="EN-US">B</span><span style="font-family:Microsoft Yahei">发送</span><span lang="EN-US">IP</span><span style="font-family:Microsoft Yahei">包时，在</span><span lang="EN-US">A</span><span style="font-family:Microsoft Yahei">不知道</span><span lang="EN-US">B</span><span style="font-family:Microsoft Yahei">的</span><span lang="EN-US">MAC</span><span style="font-family:Microsoft Yahei">地址的情况下，</span><span lang="EN-US">A</span></p> <p class="MsoNormal" style="line-height:125%"><span style="font-family:Microsoft Yahei">就广播一个</span><span lang="EN-US">ARP</span><span style="font-family:Microsoft Yahei">请求包，请求包中填有</span><span lang="EN-US">B</span><span style="font-family:Microsoft Yahei">的</span><span lang="EN-US">IP(192.168.1.2)</span><span style="font-family:Microsoft Yahei">，以太网中的所有计算机都</span></p> <p class="MsoNormal" style="line-height:125%"><span style="font-family:Microsoft Yahei">会接收这个请求，而正常的情况下只有</span><span lang="EN-US">B</span><span style="font-family:Microsoft Yahei">会给出</span><span lang="EN-US">ARP</span><span style="font-family:Microsoft Yahei">应答包，包中就填充上了</span><span lang="EN-US">B</span><span style="font-family:Microsoft Yahei">的</span><span lang="EN-US">MAC</span></p> <p class="MsoNormal" style="line-height:125%"><span style="font-family:Microsoft Yahei">地址，并回复给</span><span lang="EN-US">A</span><span style="font-family:Microsoft Yahei">。</span><span lang="EN-US">A</span><span style="font-family:Microsoft Yahei">得到</span><span lang="EN-US">ARP</span><span style="font-family:Microsoft Yahei">应答后，将</span><span lang="EN-US">B</span><span style="font-family:Microsoft Yahei">的</span><span lang="EN-US">MAC</span><span style="font-family:Microsoft Yahei">地址放入本机缓存，便于下次使用。</span></p></div></div>             <div id="Q_8" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:125%">8、<span lang="EN-US">TCP</span><span style="font-family:Microsoft Yahei">协议是面向连接的，但</span><span lang="EN-US">TCP</span><span style="font-family:Microsoft Yahei">使用的</span><span lang="EN-US">IP</span><span style="font-family:Microsoft Yahei">协议却是无连接的。这两种协议都有哪些主要的区别？</span></p></div>        <textarea id="76465" name="76465" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt">IP</span><span style="font-size:12.0pt;font-family:Microsoft Yahei">协议提供的是不可靠的、“面向非连接”的服务。</span><span lang="EN-US" style="font-size:12.0pt">&nbsp;TCP</span><span style="font-size:  12.0pt;font-family:Microsoft Yahei">协议提供的是可靠的、“面向连接”的服务。</span><span lang="EN-US" style="font-size:12.0pt">TCP</span><span style="font-size:12.0pt;font-family:  Microsoft Yahei">协议实现的是主机应用程序之间的通信，</span><span lang="EN-US" style="font-size:12.0pt">IP</span><span style="font-size:12.0pt;font-family:Microsoft Yahei">协议只实现主机之间的通信。</span><span lang="EN-US" style="font-size:12.0pt">TCP</span><span style="font-size:12.0pt;font-family:  Microsoft Yahei">协议是以</span><span lang="EN-US" style="font-size:12.0pt">IP</span><span style="font-size:12.0pt;font-family:Microsoft Yahei">协议为基础实现的，给应用层提供服务；</span><span lang="EN-US" style="font-size:12.0pt">IP</span><span style="font-size:12.0pt;  font-family:Microsoft Yahei">协议为</span><span lang="EN-US" style="font-size:12.0pt">TCP</span><span style="font-size:12.0pt;font-family:Microsoft Yahei">协议提供服务。简单来说，</span><span lang="EN-US" style="font-size:12.0pt">IP</span><span style="font-size:12.0pt;font-family:  Microsoft Yahei">协议负责将数据从一台主</span></p> <p class="MsoNormal"><span style="font-size:12.0pt;font-family:Microsoft Yahei">机传输到另一台主机，而</span><span lang="EN-US" style="font-size:12.0pt">TCP</span><span style="font-size:12.0pt;  font-family:Microsoft Yahei">协议保证传输的正确性。</span></p></div></div>             <div id="Q_9" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:125%">9、<span style="font-family:Microsoft Yahei">一个</span><span lang="EN-US">IP</span><span style="font-family:Microsoft Yahei">地址</span><span lang="EN-US">192.168.6.38/28,</span><span style="font-family:Microsoft Yahei">请问它所在子网的广播地址、网络编号、子网掩码、有效</span></p> <p class="MsoNormal" style="line-height:125%"><span style="font-family:Microsoft Yahei">主机地址范围分别是什么</span><span lang="EN-US">? </span></p></div>        <textarea id="76454" name="76454" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal" style="line-height:125%"><span style="font-family:Microsoft Yahei">分别是：</span><span lang="EN-US">192.168.6.47/28 &nbsp;192.168.6.32/28 &nbsp;255.255.255.240 &nbsp;192.168.6.33-46</span></p></div></div>             <div id="Q_10" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:150%">10、<span style="font-size:12.0pt;  line-height:150%;font-family:Microsoft Yahei">网络安全面临的威胁主要有哪些？</span></p></div>        <textarea id="76458" name="76458" rows="3" cols="80" style="margin-left:40px;" disabled="disabled"></textarea>       <div style="color:red;margin-left:20px;">正确答案：<p class="MsoNormal" style="line-height:150%"><span style="font-size:12.0pt;  line-height:150%;font-family:Microsoft Yahei">（</span><span lang="EN-US" style="font-size:  12.0pt;line-height:150%">1</span><span style="font-size:12.0pt;line-height:  150%;font-family:Microsoft Yahei">）系统漏洞（</span><span lang="EN-US" style="font-size:12.0pt;  line-height:150%">2</span><span style="font-size:12.0pt;line-height:150%;  font-family:Microsoft Yahei">）黑客攻击（</span><span lang="EN-US" style="font-size:12.0pt;  line-height:150%">3</span><span style="font-size:12.0pt;line-height:150%;  font-family:Microsoft Yahei">）病毒入侵（</span><span lang="EN-US" style="font-size:12.0pt;  line-height:150%">4</span><span style="font-size:12.0pt;line-height:150%;  font-family:Microsoft Yahei">）网络配置管理不当</span></p></div></div>                     <p class="p-title">二、单选( 每题参考分值2.5分 )</p>       <!-- 1 单项选择题 -->             <div id="Q_11" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">11、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下那个不是宽带城域网结构的组成部分？ （ &nbsp;）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45077A" type="radio" name="45077" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">网络平台</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45077B" type="radio" name="45077" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">接入平台</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45077C" type="radio" name="45077" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">管理平台</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45077D" type="radio" name="45077" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">城市宽带出口</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_12" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">12、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">交换机端口可以分为半双工与全双工两类。对于<font face="Times New Roman">100Mbps</font><font face="宋体">的全双工端口，端口带宽为</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45072A" type="radio" name="45072" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">100Mpbs</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45072B" type="radio" name="45072" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">200Mbps</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45072C" type="radio" name="45072" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">400Mpbs</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45072D" type="radio" name="45072" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">800Mpbs</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_13" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">13、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下哪项不是网络操作系统提供的服务？（ &nbsp;&nbsp;）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45112A" type="radio" name="45112" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">文件服务</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45112B" type="radio" name="45112" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">打印服务</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45112C" type="radio" name="45112" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">通信服务<font face="Times New Roman">&nbsp;</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45112D" type="radio" name="45112" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">办公自动化服务</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_14" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">14、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">802.11</font><font face="宋体">跳频扩频通信特点的描述中，错误的是（ &nbsp;&nbsp;&nbsp;）</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45065A" type="radio" name="45065" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">调频扩频通信的数据传输速率为<font face="Times New Roman">1Mbps</font><font face="宋体">或</font><font face="Times New Roman">2Mbps</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45065B" type="radio" name="45065" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">发送信号频率从一个频率跳到另一个频率的时间间隔叫做驻留时间</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45065C" type="radio" name="45065" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">802.11<font face="宋体">标准规定驻留时间为</font><font face="Times New Roman">400ms</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45065D" type="radio" name="45065" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">如果发送速率为<font face="Times New Roman">2Mbps</font><font face="宋体">，那么可以发送大约</font><font face="Times New Roman">32</font><font face="宋体">个最大长度的以太帧</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_15" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">15、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">CSMA/CA</font><font face="宋体">算法的描述中，错误的是（</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45085A" type="radio" name="45085" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">冲突避免要求每个发送结点在发送帧之前先侦听信道</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45085B" type="radio" name="45085" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">信道空闲发送帧，发送完一帧之后，必须等待若干个<font face="Times New Roman">IFS</font><font face="宋体">，必须接受确认</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45085C" type="radio" name="45085" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">接收到确认，则说明此次发送没有出现冲突，发送成功</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45085D" type="radio" name="45085" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">在规定的时间内没有接受到确认，表明出现冲突，发送失败，重发该帧</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_16" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">16、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">Ethemet</font><font face="宋体">物理地址的描述中，错误的是</font><font face="Times New Roman">( &nbsp;&nbsp;&nbsp;&nbsp;)</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45063A" type="radio" name="45063" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ethemet<font face="宋体">物理地址长度为</font><font face="Times New Roman">48</font><font face="宋体">位</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45063B" type="radio" name="45063" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">可分配的<font face="Times New Roman">Ethemet</font><font face="宋体">物理地址应该有</font><font face="Times New Roman">2</font></span><sup><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;vertical-align:super;">48</span></sup><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">个</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45063C" type="radio" name="45063" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">IEEE<font face="宋体">注册管理委员会为每个网卡生产商分配</font><font face="Times New Roman">Ethemet</font><font face="宋体">物理地址的前</font><font face="Times New Roman">3</font><font face="宋体">个字节</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45063D" type="radio" name="45063" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">标准的<font face="Times New Roman">Ethemet</font><font face="宋体">网卡的物理地址写法如</font><font face="Times New Roman">00-60-08-00-A6-38</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_17" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">17、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">OSPF</font><font face="宋体">协议的描述中，错误的是（ &nbsp;&nbsp;&nbsp;）</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45061A" type="radio" name="45061" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">OSPF<font face="宋体">使用链路状态协议</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45061B" type="radio" name="45061" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">OSPF<font face="宋体">协议要求每个路由器都形成一个区域内跟踪网络链路状态的数据库</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45061C" type="radio" name="45061" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">OSPF<font face="宋体">协议要求路由器在链路状态发生变化时用洪泛法向所有路由器发送该信息</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45061D" type="radio" name="45061" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">OSPF<font face="宋体">与</font><font face="Times New Roman">RIP</font><font face="宋体">都是以“跳数”作为路径长短的度量</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_18" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">18、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于时间等待计时器特点的描述中，错误的是（ </span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45100A" type="radio" name="45100" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">时间等待计时器是在连接终止期间使用的</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45100B" type="radio" name="45100" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">当<font face="Times New Roman">TCP</font><font face="宋体">关闭一个连接时，它并不认为这个连接马上就真正的关闭了</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45100C" type="radio" name="45100" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">在时间等待期间，连接还处于一中过渡状态</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45100D" type="radio" name="45100" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">时间等待计时器的值通常设置为一个报文的寿命的<font face="Times New Roman">4</font><font face="宋体">倍</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_19" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">19、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">应用层协议定义了运行在不同端系统上的应用程序进程的交互过程，它包括（ &nbsp;</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45097A" type="radio" name="45097" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">交换报文的类型，如请求路由报文与重定向报文</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45097B" type="radio" name="45097" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">各种报文格式，以及每个字段的详细描述</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45097C" type="radio" name="45097" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">每个字段的意义的描述</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45097D" type="radio" name="45097" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">进程在什么时间、如何发送报文，以及如何响应</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_20" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">20、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下哪个<font face="Times New Roman">TCP</font><font face="宋体">熟知端口号是错误的？（</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">&nbsp;）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45059A" type="radio" name="45059" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">FTP<font face="宋体">控制连接：</font><font face="Times New Roman">20</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45059B" type="radio" name="45059" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">&nbsp;HTTP:80</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45059C" type="radio" name="45059" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">NNTP:119</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45059D" type="radio" name="45059" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">BGP:179</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_21" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">21、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">网络结构化布线技术目前得到了广泛的应用。哪一种网络标准的出现对促进网络结构化布线技术的发展起到了关键的作用？（ &nbsp;&nbsp;&nbsp;</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45170A" type="radio" name="45170" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">10BASE5</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45170B" type="radio" name="45170" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">10BASE2</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45170C" type="radio" name="45170" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">10BASE-T</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45170D" type="radio" name="45170" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">100BASE-TX</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_22" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">22、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">在对千兆以太网和快速以太网的共同特点的描述中，以下那种说法是错误的？（ &nbsp;&nbsp;&nbsp;）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45107A" type="radio" name="45107" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">相同的数据帧格式</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45107B" type="radio" name="45107" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">相同的物理层实现技术</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45107C" type="radio" name="45107" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">相同的组网方法</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45107D" type="radio" name="45107" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">相同的介质访问控制方法</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_23" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">23、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">0</font><font face="宋体">比特插入删除的工作过程的描述中，错误的是</font><font face="Times New Roman">( &nbsp;&nbsp;&nbsp;)</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45161A" type="radio" name="45161" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">发送端两个<font face="Times New Roman">F</font><font face="宋体">字段之间检查出连续</font><font face="Times New Roman">5</font><font face="宋体">个“</font><font face="Times New Roman">l</font><font face="宋体">”，后面仍然为</font><font face="Times New Roman">l</font><font face="宋体">，则增加</font><font face="Times New Roman">l</font><font face="宋体">个“</font><font face="Times New Roman">0</font><font face="宋体">”比特</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45161B" type="radio" name="45161" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">接收端首先找到<font face="Times New Roman">F</font><font face="宋体">字段以确定帧的起始边界，接着再对其中的比特序列进行检查</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45161C" type="radio" name="45161" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">接收端发现<font face="Times New Roman">5</font><font face="宋体">个连续“</font><font face="Times New Roman">1</font><font face="宋体">”时，就将其后的</font><font face="Times New Roman">l</font><font face="宋体">个“</font><font face="Times New Roman">0</font><font face="宋体">’’比特位删除</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45161D" type="radio" name="45161" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">采用<font face="Times New Roman">0</font><font face="宋体">比特插人</font><font face="Times New Roman">/</font><font face="宋体">删除方法后，帧内就可以传送任意组合的比特序列</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_24" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">24、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">以下关于网桥的描述中，错误的是<font face="Times New Roman">( &nbsp;&nbsp;&nbsp;&nbsp;)</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45123A" type="radio" name="45123" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" align="justify" style="margin-top:0.0000pt;margin-right:0.0000pt;margin-bottom:0.0000pt;margin-left:0.0000pt;mso-para-margin-top:0.0000gd;mso-para-margin-right:0.0000gd;mso-para-margin-bottom:0.0000gd;mso-para-margin-left:0.0000gd;text-indent:0.0000pt;mso-char-indent-count:0.0000;text-autospace:ideograph-numeric;mso-pagination:none;text-align:justify;text-justify:inter-ideograph;line-height:150%;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">透明网桥的标准是<font face="Times New Roman">IEEE 802.1d</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45123B" type="radio" name="45123" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">透明网桥的路由由局域网结点负责</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45123C" type="radio" name="45123" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">透明网桥的路由表要记录<font face="Times New Roman">3</font><font face="宋体">个信息</font><font face="Times New Roman">:</font><font face="宋体">站地址、端口与时间</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45123D" type="radio" name="45123" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">网桥中的端口管理软件保证网桥的路由表能反映当前网络拓扑状态</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_25" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">25、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">IP</font><font face="宋体">多播地址的描述中，错误的是（</font></span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45121A" type="radio" name="45121" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">实现<font face="Times New Roman">IP</font><font face="宋体">多播的分组使用的是</font><font face="Times New Roman">IP</font><font face="宋体">多播地址</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45121B" type="radio" name="45121" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">IP<font face="宋体">多播地址只能用于目的地址，而不能用于源地址</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45121C" type="radio" name="45121" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">标准分类的<font face="Times New Roman">D</font><font face="宋体">类地址是为</font><font face="Times New Roman">IP</font><font face="宋体">多播地址定义的</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45121D" type="radio" name="45121" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">D<font face="宋体">类地址的范围在</font><font face="Times New Roman">212.0.0.0</font><font face="宋体">——</font><font face="Times New Roman">239.255.255.255</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_26" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">26、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">LAN<font face="宋体">参考模型可分为物理层（ ）。</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45149A" type="radio" name="45149" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">MAC<font face="宋体">，</font><font face="Times New Roman">LLC</font><font face="宋体">等三层</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45149B" type="radio" name="45149" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">LLC<font face="宋体">，</font><font face="Times New Roman">MHS</font><font face="宋体">等三层</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45149C" type="radio" name="45149" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">MAC<font face="宋体">，</font><font face="Times New Roman">FTAM</font><font face="宋体">等三层</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45149D" type="radio" name="45149" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">LLC<font face="宋体">，</font><font face="Times New Roman">VT</font><font face="宋体">等三层</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_27" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">27、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">下面哪一种不是网络管理协议？（</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45089A" type="radio" name="45089" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">SNMP</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45089B" type="radio" name="45089" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">LABP</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45089C" type="radio" name="45089" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">CMIS/CMIP</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45089D" type="radio" name="45089" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">LMMP</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_28" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">28、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">在<font face="Times New Roman">CSMA</font><font face="宋体">的非坚持协议中，当媒体忙时，则（ ）直到媒体空闲。</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45148A" type="radio" name="45148" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">延迟一个固定的时间单位再侦听</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45148B" type="radio" name="45148" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">继续侦听</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45148C" type="radio" name="45148" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">延迟一个随机的时间单位再侦听</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45148D" type="radio" name="45148" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">放弃侦听</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_29" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">29、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">IMAP4</font><font face="宋体">功能的描述中，错误的是（ &nbsp;&nbsp;&nbsp;&nbsp;）</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45098A" type="radio" name="45098" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">用户在下载邮件之前可以检查邮件的头部</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45098B" type="radio" name="45098" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">用户在下载邮件之后可以用特定的字符串搜索电子邮件的内容</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45098C" type="radio" name="45098" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">用户可以部分的下载邮件</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45098D" type="radio" name="45098" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">为了存放电子邮件，用户可以在文件夹中创建分层次的邮箱</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_30" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">30、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">下面协议中<font face="Times New Roman">,</font><font face="宋体">用于</font><font face="Times New Roman">WWW</font><font face="宋体">传输控制的是（ ）。</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45140A" type="radio" name="45140" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">URL</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45140B" type="radio" name="45140" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">SMTP<font face="宋体">　</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45140C" type="radio" name="45140" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">HTTP</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45140D" type="radio" name="45140" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">HTML</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_31" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">31、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">交换机和网桥属于<font face="Times New Roman">OSI</font><font face="宋体">模型的哪一层（ ）。</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45136A" type="radio" name="45136" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">数据链路层</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45136B" type="radio" name="45136" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">传输层</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45136C" type="radio" name="45136" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">网络层</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45136D" type="radio" name="45136" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">会话层</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_32" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">32、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">一个网络协议主要由以下三个要素组成：语法、语义与时序。其中语法规定了哪些信息的结构与格式？（ &nbsp;&nbsp;&nbsp;）。</span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p><p class="MsoNormal" align="justify" style="margin-bottom:0.0000pt;mso-pagination:none;text-align:justify;text-justify:inter-ideograph;line-height:125%;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅰ<font face="Times New Roman">.</font><font face="宋体">用户数据</font></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p><p class="MsoNormal" align="justify" style="margin-bottom:0.0000pt;mso-pagination:none;text-align:justify;text-justify:inter-ideograph;line-height:125%;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅱ<font face="Times New Roman">.</font><font face="宋体">服务原语</font></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p><p class="MsoNormal" align="justify" style="margin-bottom:0.0000pt;mso-pagination:none;text-align:justify;text-justify:inter-ideograph;line-height:125%;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅲ<font face="Times New Roman">.</font><font face="宋体">控制信息</font></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p><p class="MsoNormal" align="justify" style="margin-bottom:0.0000pt;mso-pagination:none;text-align:justify;text-justify:inter-ideograph;line-height:125%;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅳ<font face="Times New Roman">.</font><font face="宋体">应用程序</font></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45167A" type="radio" name="45167" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan;text-align:left;vertical-align:bottom;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅰ和Ⅱ</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45167B" type="radio" name="45167" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan;text-align:left;vertical-align:bottom;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅰ和Ⅲ</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45167C" type="radio" name="45167" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan;text-align:left;vertical-align:bottom;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅰ、Ⅱ和Ⅳ</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45167D" type="radio" name="45167" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="mso-pagination:widow-orphan;text-align:left;vertical-align:bottom;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">Ⅱ和Ⅳ</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_33" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">33、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">下面有关信元交换的正确叙述是（ ）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45145A" type="radio" name="45145" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">信元交换是一种使用异步时分多路复用技术的交换技术</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45145B" type="radio" name="45145" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">信元交换是分组更小的分组交换</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45145C" type="radio" name="45145" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">信元交换通过使用频分多路复用技术提高通信能力</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45145D" type="radio" name="45145" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">信元交换是基于光纤的高速交换技术</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_34" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">34、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">多媒体网络应用对端到端的服务质量的要求主要是带宽、延时、延时抖动与（</span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">&nbsp;&nbsp;&nbsp;</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45117A" type="radio" name="45117" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">误码率</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45117B" type="radio" name="45117" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">频率范围 </span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45117C" type="radio" name="45117" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">波特率</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45117D" type="radio" name="45117" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">链路效率</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_35" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">35、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">TCP</font><font face="宋体">支持字节流的传输特点的描述中，错误的是（ &nbsp;</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45080A" type="radio" name="45080" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">字节流传输描述了一个无数据丢失、重复和乱序的数据传输过程</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45080B" type="radio" name="45080" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">TCP<font face="宋体">把应用程序提交的数据看成是一连串的、无结构的字节流</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45080C" type="radio" name="45080" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">发送方为应用程序发出的每一个写操作都创建一个数据报文段</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45080D" type="radio" name="45080" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">接收端应用程序数据字节的起始与终结位置必须由应用程序自己去确定</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_36" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">36、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于数据通信的描述中，错误的是（ &nbsp;）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45084A" type="radio" name="45084" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">被传输的二进制代码的<font face="Times New Roman">0</font><font face="宋体">、</font><font face="Times New Roman">1</font><font face="宋体">称为码元</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45084B" type="radio" name="45084" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">数据通信的任务就是传输二进制代码比特序列，不需要解释代码所表示的内容</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45084C" type="radio" name="45084" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">每帧图像由<font face="Times New Roman">1024 </font></span><span style="font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">×</span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">&nbsp;768<font face="宋体">个点阵组成，每个点阵用</font><font face="Times New Roman">8bit</font><font face="宋体">表示，每秒钟传送</font><font face="Times New Roman">30</font><font face="宋体">帧，那么每秒钟需要传送</font><font face="Times New Roman">23 592 960bit</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45084D" type="radio" name="45084" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">对语音信号取样每秒<font face="Times New Roman">22 050</font><font face="宋体">次，每次取样值占用</font><font face="Times New Roman">1</font><font face="宋体">字节，双声道立体声每秒钟需要传送</font><font face="Times New Roman">44 100</font><font face="宋体">字节</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_37" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">37、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">网卡实现的主要功能是（ &nbsp;&nbsp;&nbsp;&nbsp;）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45066A" type="radio" name="45066" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">物理层与网络层的功能</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45066B" type="radio" name="45066" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">网络层与应用层的功能</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45066C" type="radio" name="45066" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">物理层与数据链路层的功能</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45066D" type="radio" name="45066" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">网络层与表示层的功能</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_38" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">38、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于无线自组网路由协议研究的描述中，错误的是（ &nbsp;&nbsp;&nbsp;）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45164A" type="radio" name="45164" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">无线自组网是一个多跳的网络</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45164B" type="radio" name="45164" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">由于无线自组网中的结点是移动的，因此无线自组网的拓扑结构会不断变化</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45164C" type="radio" name="45164" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">无线自组网的路由协议需要在拓扑结构动态变化的条件下提供正确的路由</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45164D" type="radio" name="45164" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">无线自组网路由协议的研究主要集中在无线<font face="Times New Roman">MAC</font><font face="宋体">子层</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_39" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">39、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">在网络配置管理的功能描述中，以下那种说法是错误的（ &nbsp;&nbsp;）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45129A" type="radio" name="45129" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">识别网络中的各种设备，记录并维护设备参数表</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45129B" type="radio" name="45129" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">用适当的软件设置参数值和配置设备</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45129C" type="radio" name="45129" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">初始化、启动和关闭网络或网络设备</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45129D" type="radio" name="45129" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">自动检测网络硬件和软件中的故障并通知用户。</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_40" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">40、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">IP</font><font face="宋体">报头选项的描述中，错误的是（</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45081A" type="radio" name="45081" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">设置<font face="Times New Roman">IP</font><font face="宋体">报头选项的主要目的是用于控制与测试</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45081B" type="radio" name="45081" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">选项包括源路由，记录路由，时间戳等</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45081C" type="radio" name="45081" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">源路由是由发送分组的源路由器制定的传输路径</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45081D" type="radio" name="45081" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">时间戳可以分别将分组经过每个路由器的当地时间记录下来</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_41" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">41、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">ATM<font face="宋体">信元长度的字节数为（</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45090A" type="radio" name="45090" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">48</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45090B" type="radio" name="45090" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">53</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45090C" type="radio" name="45090" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">32</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45090D" type="radio" name="45090" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">64</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_42" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">42、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">TCP</font><font face="宋体">窗口与拥塞控制概念的描述中，错误的是（ </font></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">&nbsp;）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45159A" type="radio" name="45159" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">连接建立时设置的窗口大小一定是最大报文段长度的几倍或几十倍</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45159B" type="radio" name="45159" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">发送端口确定的依据是：发送窗口<font face="Times New Roman">=Min[</font><font face="宋体">通知窗口，拥塞窗口</font><font face="Times New Roman">]</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45159C" type="radio" name="45159" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;mso-ascii-font-family:&#39;Times New Roman&#39;;mso-hansi-font-family:&#39;Times New Roman&#39;;font-size:10.5000pt;mso-font-kerning:1.0000pt;">拥塞窗口是接收端根据网络拥塞情况确定的窗口值</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45159D" type="radio" name="45159" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p>   &nbsp;  </o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_43" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">43、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">对于下列说法，哪一种是错误的？（</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45087A" type="radio" name="45087" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">TCP<font face="宋体">协议可以提供可靠的数据流传输服务</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45087B" type="radio" name="45087" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">TCP<font face="宋体">协议可以提供面向连接的数据流传输服务</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45087C" type="radio" name="45087" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">&nbsp;TCP<font face="宋体">协议可以提供全双工的数据流传输服务</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45087D" type="radio" name="45087" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">TCP<font face="宋体">协议可以提供面向非连接的数据流传输服务</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_44" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">44、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">网络应用系统设计工程师在设计一种新的网络应用时，注意力首先应该集中到（</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">&nbsp;&nbsp;&nbsp;）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45057A" type="radio" name="45057" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">传输层协议</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45057B" type="radio" name="45057" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">应用程序体系结构</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45057C" type="radio" name="45057" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">应用层协议</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45057D" type="radio" name="45057" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">应用软件编程</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_45" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">45、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">一个功能完备的计算机网络需要制定一套复杂的协议集。对于复杂的计算机网络协议来说，最好的组织方式是（ &nbsp;&nbsp;&nbsp;&nbsp;）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45068A" type="radio" name="45068" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">连续地址编码模型</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45068B" type="radio" name="45068" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">层次结构模型</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45068C" type="radio" name="45068" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">分布式进程通信模型</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45068D" type="radio" name="45068" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">混合结构模型</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div>             <div id="Q_46" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">46、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">ARP</font><font face="宋体">的描述中，错误的是（</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45082A" type="radio" name="45082" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">从已知的<font face="Times New Roman">IP</font><font face="宋体">地址找出对应的物理地址的映射过程叫做地址解析</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45082B" type="radio" name="45082" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">从已知的物理地址找出对应的<font face="Times New Roman">IP</font><font face="宋体">地址的映射过程叫做反向地址解析</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45082C" type="radio" name="45082" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">ARP<font face="宋体">定义了请求分组和应答分组的格式</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45082D" type="radio" name="45082" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="line-height:125%;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">请求分组和应答分组都是采用广播方式发送的</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_47" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">47、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">IP<font face="宋体">协议文献的讨论中经常将分组称为（ &nbsp;&nbsp;&nbsp;）。</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45115A" type="radio" name="45115" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">数据报</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45115B" type="radio" name="45115" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">帧</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;"> </span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45115C" type="radio" name="45115" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">数据</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45115D" type="radio" name="45115" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">报文</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【A】</p></div>             <div id="Q_48" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">48、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">下面哪一个是有效的<font face="Times New Roman">IP</font><font face="宋体">地址？（</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;"> </span><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">）。</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45088A" type="radio" name="45088" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">202.280.130.45</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45088B" type="radio" name="45088" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">130.192.290.45</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45088C" type="radio" name="45088" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">192.202.130.45</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45088D" type="radio" name="45088" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">280.192.33.45</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【C】</p></div>             <div id="Q_49" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal" style="line-height:20.0000pt;mso-line-height-rule:exactly;">49、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">以下关于<font face="Times New Roman">10GE</font><font face="宋体">主要特征的描述中，错误的是</font><font face="Times New Roman">( &nbsp;&nbsp;&nbsp;&nbsp;)</font><font face="宋体">。</font></span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45103A" type="radio" name="45103" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">10GE<font face="宋体">仍然保留了</font><font face="Times New Roman">802.3</font><font face="宋体">标准对</font><font face="Times New Roman">Ethernet</font><font face="宋体">最小帧长度和最大帧长度的规定。</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45103B" type="radio" name="45103" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">10GE<font face="宋体">的传输介质只使用光纤</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45103C" type="radio" name="45103" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">10GE<font face="宋体">有两种不同的物理层标准</font><font face="Times New Roman">:LAN PHY</font><font face="宋体">与</font><font face="Times New Roman">WAN PHY</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45103D" type="radio" name="45103" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">10GEt<font face="宋体">帧将插人到</font><font face="Times New Roman">OC-192/STM-64</font><font face="宋体">帧的净载荷区域中，速率仍保特在精确的</font><font face="Times New Roman">10Gbps</font></span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【D】</p></div>             <div id="Q_50" class="pad_top">        <div style="padding-left:20px;"><p class="MsoNormal">50、<span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">在采用点—点通信线路的网络中，由于连接多台计算机之间的线路结构复杂，因此确定分组从源结点通过通信子网到达目的结点的适当传输路径需要使用 （ &nbsp;&nbsp;&nbsp;&nbsp;）</span><span style="font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p></div>        <div class="radio" style="padding-left:20px;">                              <label style="display:inline-block;">            <input id="45067A" type="radio" name="45067" value="A" style="display:inline-flex;margin-top:4px;" disabled="disabled">A.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">差错控制算法</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45067B" type="radio" name="45067" value="B" style="display:inline-flex;margin-top:4px;" disabled="disabled">B.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">路由选择算法</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45067C" type="radio" name="45067" value="C" style="display:inline-flex;margin-top:4px;" disabled="disabled">C.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">拥塞控制算法</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                     <label style="display:inline-block;">            <input id="45067D" type="radio" name="45067" value="D" style="display:inline-flex;margin-top:4px;" disabled="disabled">D.&nbsp;<p class="MsoNormal" style="display:inline;"><span style="mso-spacerun:&#39;yes&#39;;font-family:Microsoft Yahei;font-size:10.5000pt;mso-font-kerning:1.0000pt;">协议变换算法</span><span style="font-family:Microsoft Yahei;font-size:12.0000pt;mso-font-kerning:1.0000pt;">  <o:p></o:p></span></p>           </label><br>                           </div>       <p style="color:red;padding-left:20px;font-size:15px">错误:【B】</p></div></div>
			</div>
			
			<div class="col-md-2 col-sm-2 col-xs-12 exam-body-back">
				<div class="col-md-12 exam-cutdown">
					<h4><i class="glyphicon glyphicon-hourglass" aria-hidden="true"></i>&nbsp;倒计时</h4>
				</div>	
				<div class="col-md-12 col-sm-12 col-xs-12 exam-body-stu">
					<p id="kaoshitimeleft">01 : 39 : 26</p>				
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				<h4 class="h4-tag"><i class="fa fa-minus-square-o" aria-hidden="true"></i>&nbsp;答题卡</h4>
				
				<div id="datika" class="col-md-12"><div class="col-md-12 col-sm-12 col-xs-12 pad-0">      <p class="" style="display:block;">一、简答</p>                     <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_1" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_1" class="answerselect" style="background-color: red;">1</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_2" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_2" class="answerselect" style="background-color: red;">2</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_3" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_3" class="answerselect" style="background-color: red;">3</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_4" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_4" class="answerselect" style="background-color: red;">4</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_5" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_5" class="answerselect" style="background-color: red;">5</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_6" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_6" class="answerselect" style="background-color: red;">6</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_7" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_7" class="answerselect" style="background-color: red;">7</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_8" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_8" class="answerselect" style="background-color: red;">8</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_9" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_9" class="answerselect" style="background-color: red;">9</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_10" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_10" class="answerselect" style="background-color: red;">10</a></div>                  </div><div class="col-md-12 col-sm-12 col-xs-12 pad-0">      <p class="" style="display:block;">二、单选</p>                     <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_11" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_11" class="answerselect" style="background-color: red;">11</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_12" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_12" class="answerselect" style="background-color: red;">12</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_13" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_13" class="answerselect" style="background-color: red;">13</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_14" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_14" class="answerselect" style="background-color: red;">14</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_15" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_15" class="answerselect" style="background-color: red;">15</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_16" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_16" class="answerselect" style="background-color: red;">16</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_17" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_17" class="answerselect" style="background-color: red;">17</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_18" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_18" class="answerselect" style="background-color: red;">18</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_19" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_19" class="answerselect" style="background-color: red;">19</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_20" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_20" class="answerselect" style="background-color: red;">20</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_21" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_21" class="answerselect" style="background-color: red;">21</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_22" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_22" class="answerselect" style="background-color: red;">22</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_23" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_23" class="answerselect" style="background-color: red;">23</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_24" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_24" class="answerselect" style="background-color: red;">24</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_25" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_25" class="answerselect" style="background-color: red;">25</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_26" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_26" class="answerselect" style="background-color: red;">26</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_27" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_27" class="answerselect" style="background-color: red;">27</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_28" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_28" class="answerselect" style="background-color: red;">28</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_29" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_29" class="answerselect" style="background-color: red;">29</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_30" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_30" class="answerselect" style="background-color: red;">30</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_31" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_31" class="answerselect" style="background-color: red;">31</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_32" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_32" class="answerselect" style="background-color: red;">32</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_33" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_33" class="answerselect" style="background-color: red;">33</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_34" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_34" class="answerselect" style="background-color: red;">34</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_35" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_35" class="answerselect" style="background-color: red;">35</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_36" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_36" class="answerselect" style="background-color: red;">36</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_37" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_37" class="answerselect" style="background-color: red;">37</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_38" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_38" class="answerselect" style="background-color: red;">38</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_39" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_39" class="answerselect" style="background-color: red;">39</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_40" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_40" class="answerselect" style="background-color: red;">40</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_41" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_41" class="answerselect" style="background-color: red;">41</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_42" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_42" class="answerselect" style="background-color: red;">42</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_43" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_43" class="answerselect" style="background-color: red;">43</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_44" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_44" class="answerselect" style="background-color: red;">44</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_45" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_45" class="answerselect" style="background-color: red;">45</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_46" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_46" class="answerselect" style="background-color: red;">46</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_47" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_47" class="answerselect" style="background-color: red;">47</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_48" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_48" class="answerselect" style="background-color: red;">48</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_49" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_49" class="answerselect" style="background-color: red;">49</a></div>                            <div class="col-md-3 col-sm-4 col-xs-6 pad-0"><a id="A_50" href="http://wljy.whut.edu.cn/web/showBeforePractice.htm?stuId=192373412300004&amp;instNo=641619&amp;limitTime=100#Q_50" class="answerselect" style="background-color: red;">50</a></div>                  </div></div>
				
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